本题目来源于试卷: Physics Unit18: Electric Currents，类别为 国际高中通用物理
[单选题]
The heating element in zy5e7c ix3o z:c(qc5zyr/ 3 cman elec / ar:,/ uot*oiph1fpstric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the Nichrome wire by 10%. (Assuma1frp/*sp,ot hi:ou/ e the temperature is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?
A. Power is still 2.0 kW.
B. Power increases to 2.2 kW.
C. Power decreases to 1.8 kW.
D. none of the given answers
参考答案: B
本题详细解析:
暂无
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